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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee18bef9897817e1de8e141641a6252d4e11ace0318c8c7d025fbbe7db25e59e' 
  AND token = 'JZNWAzpbyuxO+jRj70SUsaXb0lRWwd+d6pLDtBA1mJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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