Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6cfafd3001c4b18dda90d8ad1da25af3c249782263267e18b16aa7bda4a44536' 
  AND token = 'MAhoMu1ZULYtBXXo86W8AeohHPP9w4HN3oV8jtfW9mM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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