Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '68b7063671e24b085c32e14f8a8d3969723f289d740b27170464d9137528b7d8' 
  AND token = 'efvFAofBk5mvn+pDkHfaH8K8ASXpXRIz8U+q7HvWrvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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