Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d872d050a9acca351358c8cd5ead011cbed961eac854ef3e2bce1d556c3c2c' 
  AND token = '7O02UNtDJ+KIcIUs9PLAKpxtrmhPMMELCFWwnBYxrd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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