Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e96fe9537d3f49212e7a7247fdd4fb771e842bdb9cf443ffdd676e3058cc0ad9' 
  AND token = 'tmk9fntv4GmMOThppIjtRn3NnaV89EHvf7RWbPMYo30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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