SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c452987be1151c18d7068c3c83b3bbff9abfa47c2744667e9bcfe33c327439e5' 
  AND token = '/hYnJ8ZSCdqOKi9+nFLiYce3e6V8/y8QKiv3Yq1WYCw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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