SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a22606a0b917323356ee95fc8fabcca7d81b885437a345fb93bc173a6fd92384' 
  AND token = 'tKhhN7wqh6a6gsPSuqGW8U021BU3zIujLMb+ONUWRMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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