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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30030c80b1acefc9005a8663382c3bc39658d472fb16611660aeff5dc126e189' 
  AND token = 'Fv1ghxm58wIfKe4GwC+lNH8GYstx7dVTr3cIrp181hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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