Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1800c45a2f3cdebcab738fe96f67a050fd5b2e0ba2920c46860d9100c74f86c' 
  AND token = 'mlrxjd9wiuEbwhGbmYCceq//CqCLSjQeBVRh8L3SSo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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