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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5e99b18d9256b4266cea7b6c0ebef715b003e51b9d55ee45df8c867c2e242c9' 
  AND token = '1Iuzo7DUWxnEsDQqCuHClKExBtAtEzqKw8ihAm7fJuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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