Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed09249ec40eb164074ca9ce4d7b92b826086eb033bc9ae55c19d82269612a59' 
  AND token = 'XS8jnYZLnOIx/uUw/jNACbbhmpREtaSlFzHkeb+A9Sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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