Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1cb1d26c6f8f51922949dc77563391464471c2bc322e4eded87768729326e38' 
  AND token = 'X2kvTrPevK1IvkmwkTNuPiCozcscEPG2k1z3zPGvkX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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