Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '427361a86f63079888fc26c0f2555f9716578fe0dc3584962f357920bd6e7a6a' 
  AND token = 'kl86yWKJt1nh1p8lJmhvo3p8X99Vvt/YkdSvdISOR1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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