Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da708d26b19dfb2599357e51d33e94e3906de84144f578723974b716506d3cbb' 
  AND token = 'BK1AHTxq5xoDigJMUP4SP56jYe0fZWFlFTnC7KMXWOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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