Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1730491270b7f179e3ac671cf3d6db4501a2b31661bf11f0500598d0791d448' 
  AND token = 'YIaIis74cWQeNIRBW3a9Dum7Z3IhoNhWssxtoFacT/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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