Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cd8d490694a2e56f532a171a8db9c01fc30cdb5cb9bd181b3d07d78db652b83' 
  AND token = 'fpv2PeOLJtwEKBbd/m4a7F2jOzl4MWlyd8CMvfDiKsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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