SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e1e86601b129fcbe7cbb826cb9a2acf0165edfb00af5201622e1f961bba783' 
  AND token = 'VLp1mcwwuJeTzIASvHFVkxYdbMyL3teV1Ffld+V9xUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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