Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2825abe15e89fda814012a15aa446616fa0a878807d6daaa883b11e23b5b69aa' 
  AND token = '1icnyX7uiJLb2KhdsfSMkrCRbWVd5tQEeajFCwif6vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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