Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb8167ecde7d997cb75fda545e0cd570b6e67240dcace48f5ad965ba0e175451' 
  AND token = 'pIg3dJh2rWV0cOPIPuuBLjtcNHfHWckfuaT9ibX/uU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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