Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ab09f9d6c1dd9c08324febb9645cb5c022cb21e01c8955170ddc86d99317d9a' 
  AND token = 'gyU4mvOrE3CnOa9AYnw6Bch28OxSrMnGIGnE2ikHJs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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