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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fa1bd5a4180a71f4e81da516cde10ead73084f86aec3737f9d1fea41fe68748' 
  AND token = 'Y5e4N88JjC/+DtZSo5jG5NjHGV3QcSZ9KPTxAZXgoXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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