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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8013bae026da3fd0b199092882cde0c8b19a75ce7a172087968d49eb96f00a10' 
  AND token = 'joMhB+L0XBPzpLwocqYd/GRPOm8oN6Py4wQbhASnlIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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