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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0232aec314e7590ff4084a9cdf2f26ad859a28fd376d7c194b7d8f31e334145a' 
  AND token = '7NCB3XBXYVNChH5eubxPoQv/OzZa5YU2p4y5ccpPl9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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