SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7b3b508733b21f6f1d39c73963af4d99e8b76f157f94af8f518ebf22db69848b' 
  AND token = '0lqoVlt39uqm/Hz/AnEhRvVNoyPJmKLGavbGPEYqbco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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