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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7c177390c0b7226e2d4464fe5f80955e39d7a89263e35f6482f6cdc70283064' 
  AND token = 'E7Mxay+hr03FS9aQQKhX8lZgGN3NcXz8hd2UTztvyTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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