Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b39f7b86f41567b72df1d7a301b10f5420451ab1cd906db7f57fca4610f37474' 
  AND token = 'A4XfJlRh8q8lPAyUOHEGjSk6sPG0sY7XPf5vX3jTfw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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