Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '730ea92359690ee9ff6b43b25e1e9e907396ddc93db8f35049efdc8ad6ed9fac' 
  AND token = '4qHqui74yABYvDjNMKjY4vUN04TLew3RwpTzOZkejas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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