Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '930257916e34866fd37869c26204d3e3ee36ef03f795cc4d272047964003eb98' 
  AND token = 'Hlb1kBvJi7H1/Ku/FCWq6rGHrGUmk4aA0OjwsAYG94Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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