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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6abad8017db8d230447d4e821417f3c0366c422f15bac2fecfe095cb77a6a92a' 
  AND token = 'BoG+exnlnfOODH1EReHOPcko5PrK/yEropsR6E3Wd7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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