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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba6305e23f3ac1eb33cd0fc04caba9ab5ba8cf45f5bc271c3df323f24ba4f61' 
  AND token = 'BHQ2j6WmZaaI9G3jgsThufc0AfvBK+dz7PR/PZWuRDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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