Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f2354123225d37a7a48e77275ce1abdcef00c425c1fa11224bd2dd5ef4a607f' 
  AND token = 'iguPOICM8bavBjt0xDketd55uuWBJxT0uYfxeeD1skk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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