Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9cb9435bab88079129bdfd3f2b5488e86f4824ac86dc3bf27bd0846d3b1ab10' 
  AND token = 'v2Nu8G0iiEKPKOAazxK5TWwcDTR6x5MOdNBGL5w0d5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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