Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a1d960f0d497aba98946a5b9bb10682c08717450b9f9403398accb6660726b6' 
  AND token = 'yTcN/a2vVaraBtQd5RdHhwKwjdfAOIDACPyziyWH2Ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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