Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8c35367919a9e853b44064f6e09ff0485085c0b2d3acb8c879e895f9694304c' 
  AND token = 'YZXKmapW4amNJfdZFzYrMp9P8cWnn5KZXFKGFFcuWdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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