Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ddcdde7ba341cd1aefab92e8ae9020bc03d0593261dd150d9fd08c9c71670b' 
  AND token = 'DB2AxMYmPWekJFO32xo6Mw24gMhdeqyHC4gLT+p5Rps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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