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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e0ee472f8bb1e4a3d9320d9e84269ad9310a1fdc324e3daf825684c676c6fe9' 
  AND token = 'Eqt8II1w0/J7pm36QCbZikqu7O5DGsPXlkLtdfLQggs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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