Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '718347866067d9c9bd23e9bf712900cffb1a99318d29ac4b4e50516b479b54cb' 
  AND token = 'jSJt2CLdd07ne41pd+O/3D3lh8HXkuSC7JQUzsLoF40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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