Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97f53e72cbbefd6db077b15962b9ca2fbfa907c86e3954648c7247af0ddf282d' 
  AND token = 'MbuK3L3YpwRg+E/nCyn/MukmIXE9UUb3iy3Wk1CvcYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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