Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f21e432eadfe1a5c9f3207f19deb12e61511a9ec08c104b6fff3d44b82aeba97' 
  AND token = '2jRzN3PUU8KCJAD/zJkC0xG780m01GEz6qNm76aUVFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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