Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '106f85fc56918a86fea242f41745a3f6be51a03b3e3642b2232a203a297eb23d' 
  AND token = 'Ekf+UvDRPL4TqVsI1mssijecqajAArl/bXG24JvQZSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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