Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab70b9abfaccb075dc62b69a4685ac75515577573cf997ab43d638b6d6107cec' 
  AND token = 'Iqn1ugfrg+ehvaO/k0DaTFAH1+mxBFtGErs/kUVzsEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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