Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1ce0104b26c094ad00dbe51affbdaf438f9aff9b6a0fe195a32a39faa5e5328' 
  AND token = 'nQmPiccyleZRXvyYqrUfjJQQzfj8fve4HLJ4JeSUFTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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