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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce94683f3d7a91cf0229e1cfa96d5f774f6f73ea81593ab9d8e8f4c6c4d2ff8f' 
  AND token = 'knAs/zwxg4ewDLeIUtvnIbPJI5pdxWQEkuWdDhAeFTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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