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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38b05c6548841609f347007806fcf0dac15e6e217a9b6195428c6ac2b39f222f' 
  AND token = '3KiErkG99NqyeMenOnUpBfueqlHrPBKY3cZ0ZT7I00k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}