Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6000cbd9776e70fd8155efd33a4fcaa0313821442f0bc9eb2e5e9f5040fa305c' 
  AND token = 'z4oBLNGmDRTmDUsSmJrjPyZ8x4IZ2XFUoWkR4nLth0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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