Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef426fab408b847469a274e63c41cd877b6c04a0fe2ef74ece8c42e4dcaa0edf' 
  AND token = 'mrleDw4rjPrOh9PSmGLGJ3yRGV5pDhx2Otr+bRGlynI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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