Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '858acb837097bae2927a945785f7a9e2c6bf7585b020ee8a3ce66e281224bd77' 
  AND token = 'dyF7IHFiV/9ZUjk6n3G+aiK0aU/dF7AO7UimelfIKGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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