Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '614e1d48b6e7f3241846f31b09622b2acba5e449b5c9cb5507954e2b76f1910a' 
  AND token = 'McMsOgMY0IMvlfzFjol68kOIW0ulrR5UKKnfFU1c0ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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