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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11efe2ddd4a483c82ce4b5b7480b15185abd62b52a4ca26d5bdabb761b25ff4f' 
  AND token = 'g7C7va2Hjopw32bh97NS/+OhsXQzr9Uof/OI8XoUizM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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