Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32c919973527ab148414395847198d4b1dfe1f1ba9f616197751c5b94d6a979b' 
  AND token = 'Ia3mcD8TfLi1E+mOqbsY72TKxipblcjmMMXNh8BXFeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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