Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'acd7ce8b95f7758e971e67dc434857ab7c8df2b6d71e46b60163a1e3ba1a75c5' 
  AND token = 'TGSdiGT/gnrc6VeNP+4fa6IVdgayO8UBh7A/222ZV3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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