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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f58980d2ec1e2ca0c8d523d15627c05ba17957e41bb6e1b630e3c49fad66c90' 
  AND token = 'Cp/EhHUoBo1uU/euNQ81WeokahZtvFWF3gHCtBAKjT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}