SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '665e07fb431c3fc3fa983baa7e0e08d854291b2aa7317f859b45341f78192c4d' 
  AND token = 'EzkiCSsKjqRnTLsLl8/9w1jCuq2+4Qh2AgqNevRd2Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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