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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1425f1b2af3c60863a5b75d711d231505593f00ce561715ab5925b7218de6e3' 
  AND token = 'WAilPPDlyLgt6FJw0xRT57gzOZxPbnOWKIbd4LGJzyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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