Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf07c4296af9cfd66a7996887cb3cc6afe294fdbbcfd0dab6b424044bca74513' 
  AND token = 'dZv5JwMPW9N1/VWrHO0zNz+q1PjmsxztQwbk9NJMqqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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