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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2081968dbc6e5d2629045e1dbd42ac4d8ce41056ccab0711c88c5ae3dcaec0' 
  AND token = 'GwdLIGUngiR0te74SYn2d6c7AXO/AF6/2/lcMstR1NY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}