Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3edbd53a73ec716ce6bab936e16ae37db867ae8187116151a5d96ee6b3a1e27a' 
  AND token = 'J+TohDQ6cZNEnbSfx/8XXVQl9JVWWJNrULSd5ATVRX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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