Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dd6d23b972da804892c14b962f8d0e7fc6f9821961ca5230bad2def6c9edc0e' 
  AND token = 'bPs/fRQyE1JIwFBxZcR6cHKMaL0eSin3QnGWc2JABCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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