Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa873f103edf003e9dfebc6ed51a1f3fb9d61bf4665ce3f6e68421909cac4280' 
  AND token = 'grU48FbrrJFNxcGmslMUcL6ZOFKomTILVVjszIyIa+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}