Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4406bc518e6c10b0a64a408047c4475acab8c45d1c60475a59391a7c5f71a141' 
  AND token = '2pJlwW1vcsvDeLURMbSpR7vVXXbqyRJfgwTygk57FVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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