Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d928f7ca83fe7ce22b607bf5c793f5270240dd240c0ace068eebdc4fc896546' 
  AND token = 'm0fAcD6cpsnv1G5ZUt5jAZ2D1EXBcICt6IZOG1ZHN1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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