Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f34be8811728552ec2ccc8c56efa632c26fea78ddf60a978f44e69ed4c017ca' 
  AND token = 'Msgc/MKkQx9uLiVrlFosfv+cyfKzr4vV4k7ILhsW1g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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