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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '650e3cb20ae6e604f91b9d3aca3ef7d818794904d3e96c9bd3c2d2b6b8ced3ad' 
  AND token = 'gxDDJWK+YmWCMKWoH/x1AJgIO94oDNPrrvg/6q72EN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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