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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b233cf36ab4fb006e624d9a3ec94c74ab5ff6c7a4b8895bb613efab552993f7' 
  AND token = 'LeSwWKG6RCbeJlk2+JNAx6o/75BMRwb+o8SEsVa91/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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