Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c04078fedf0531c3917014e2692f8231fc7d6db82e575e89f8b37a814c45377b' 
  AND token = '9Y78eGEXPxDao1iDSIUjNxOJx8TEzrRYxagyFywYENc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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