Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c5edf9894f7bc63f2561ae8072087323b26d5ba1ffd5cea0591a4a8c50dce5' 
  AND token = 'tmsL0tx2EYEIfx31RMMUjHJMmjjYpwjimStMguGf33c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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